The Barcelona Supercomputing Center has mapped immune aging differently for men and women using single-cell RNA sequencing on nearly a thousand adult blood samples.
Women show sharper rise in inflammatory immune cells with age
As women age, their immune systems accumulate significantly more inflammation-prone cells, offering a molecular explanation for why they are disproportionately affected by autoimmune diseases after menopause.
Men’s immune aging is slower but carries hidden leukemia risk
In older men, researchers detected blood cells with pre-leukemic mutations, suggesting a stealthier form of immune decline that may explain higher blood cancer rates in aging males despite less overall immune change.
Study overcomes past limitations by analyzing individual cells
Previous research often averaged cell activity, masking subtle shifts. this team used MareNostrum 5 supercomputing power to resolve 20,000 genes across over a million immune cells at single-cell resolution.
Why did past research miss these sex differences?
Most studies focused on males or used bulk analysis, which obscured the gradual, sex-specific changes now visible through high-resolution single-cell sequencing.
What does this mean for future medical care?
The findings support the need for sex-specific approaches in treating age-related immune decline, potentially guiding earlier screening or tailored therapies for autoimmune disease in women and blood cancer in men.